Blocks Definition and 767 Threads

I just began a course on computer science and we're to use Code Blocks as the program to use, but I can't get the darn thing to work. The built in simple program called "hello world" is supposed to have a black window pop up that says "hello world", but the window pops up and disappears and I...

1. A block with mass m1 is placed on an inclined plane with slope angle α and is connected to a second hinging block with mass m2> m1 by a massless cord passing over a small frictionless pulley. The coefficient of kinectic freiction between mass ma and the incline is negligible. Find: (a) the...

Homework Statement A block of mass 3kg sits on top of a block of mass 2kg. The static coefficient of friction between the blocks is μs=0.3, and this friction keeps the top block from sliding on the bottom block. There is no friction between the bottom block and the floor. A horizontal external...

Homework Statement Let S_n = 1 + (1/2) + (1/3) + (1/4) + ... + (1/n) a) What value of n is required such that S_n > 100? b) Show how one can form a stack of identical blocks (one per row), each 1 ft long, so as to form a "wing" (I don't know what the correct word in English is, but I...

I hope this is the right area of this.. Guys, I need to know... what does a Punchdown block do? I see these in wiring closets, where the telephone or ethernet cable is flayed open, and the wires inside are stuck into the blades of the block. I'm studying for the Network+ exams, and they mention...

If I needed to describe a physical object it would be necessary to associate certain properties to it, properties I perceive as being related to this object. For example, when someone describes a massive soft blue ball bouncing in a white room what I would imagine is: a white background; a blue...

Homework Statement Two identical blocks of the same mass travel at velocities of 3v and 2v on a smooth surface as shown (same direction). Two blocks move together after collision. What is their common velocity? Homework Equations Conservation of momentum The Attempt at a Solution Let...

Homework Statement A block of mass M_2 can move over another bigger block M_1=5.0M_2 . The coefficient of static friction between the small and big blocks is \mu _s=0.40 , the kinetic coefficient between them is \mu _{k,2}=0.30 , and the kinetic coefficient between the big block and the floor...

Homework Statement a 30 kg is restin on a flat horizontal table. on top of this block rests a 15 kg block, to which a horizontal spring is attached, as shown in the drawing. the spring constant is 325N/m. the coefficient of kinetic friction between the lower block and the table is 0.600, and...

Homework Statement Two blocks are connected by a string that goes over an ideal pulley as shown in the figure and pulls on block A parallel to the surface of the plane. Block A has a mass of 3.00 kg and can slide along a rough plane inclined 30.0° to the horizontal. The coefficient of static...

*****Homework Statement **** Two blocks, A and B, are sliding down an inclined (20 degrees) plane. Block A is sliding in front of block B with both of them touching. The blocks slide from a distance of 6.50m from the bottom (along the inclined plane, not the surface the plane rests on)...

Homework Statement I have 2 blocks. M1 is resting on a horizontal plane and attached to a string that goes over a pulley to M2. The plane is like an air hockey table to simulate very little friction. I attached spark tape to M1 so I could measure the time it took and distance traveled. Now...

Homework Statement Here is the problem: Block A in the figure weighs 1.05 , and block B weighs 3.90 . The coefficient of kinetic friction between all surfaces is 0.32. Find the magnitude of the horizontal force necessary to drag block B to the left at constant speed if and are...

Homework Statement There are three blocks connected by strings as shown in the figure. Each block has the mass as following mass, m1=0.8kg m2=2.2kg m3=1.7kg Assuming there is no friction, Homework Equations F=MA The Attempt at a Solution In my FBD of the hanging box...

An 6.40kg block rests on a 12.5kg block. The interface between the lower mass and the table is frictionless, but there is friction (static friction μs and kinetic friction μk) between the two blocks. A horizontal force F acts on the upper block and causes both blocks to accelerate. The...

Homework Statement The last question on this page(#44): http://dacc.edu/~ksturgeon/106c5webpage.pdf I haven't had any problems with any homework till now so I'm hoping for a little guidance here. I guess my main issue is I don't understand what it means by magnitude of force. Because it seems...

Homework Statement Two blocks of mass m1 and m2, resting on a frictionless tabletop, are connected by a massless string passing through a frictionless pulley of mass mp. The figure shows a top view of the arrangement. If a force of magnitude F is applied to the pulley in the direction...

Is there any process or device that blocks EM waves of one phase (by any means, absorption, reflection, refraction, etc) but allows the transmission of EM waves of an alternate or opposite phase? Such that only waves of a certain phase can transmitted? Alternatively, are there any...

Just read this article and figured I'd share it: http://arstechnica.com/science/news/2012/01/size-matters-when-things-are-just-right-water-flows-freely.ars However I do have a question. The article never explained why helium, hydrogen, and other gasses were being blocked, they only explained...

Homework Statement Two blocks are connected by a string as in the figure below. What is the upper block's acceleration if the coefficient of kinetic friction between the block and the table is 0.10? Express your answer to two significant figures and include the appropriate units...

Homework Statement http://imageshack.us/photo/my-images/851/45009287.png/ The problem(s) are shown in the link, but I'm having trouble getting them started. Homework Equations The Attempt at a Solution For 3-12: I think what I need to do is find the tension force in the...

Hi, Imagine: a computer program like 2D Lego with only 1 type of block (a small square one) with which you can create constructions. Blocks can be placed on an invisible grid. There is gravity, and boxes can't fly, so you need to build any construction from the ground up. Boxes are always...

Homework Statement For two touching blocks, a constant horizontal force Fa is applied to block A to the right, which pushes against block B with a 26.0 N force directed horizontally to the right. In figure (b), the same force Fa is applied to block B to the right (the blocks switched places)...

Homework Statement In the diagram below find the 1) acceleration of the system 2) T1 and T2 The ramp is angled 35degrees to the horizontal and coeff of friction is 0.15 Homework Equations The image at the top is the problem's figure...

Homework Statement The figure shows two 2.5 kg blocks connected by a rope that has a mass of 450g. The entire assembly is accelerated upwards at 7.4 m/s^ What is the tension at the bottom end of the rope, near block B What is the tension at the at the top end of the rope, near block A...

Homework Statement A 2.0 kg block slides along a frictionless surface at 1.0 m/s. A second block, sliding at a faster 4.0 m/s, collides with the first from behind and sticks to it. The final velocity of the combined blocks is 2.0 m/s. What is the mass of the second block? Homework...

Homework Statement We have an inclined plane, 20 degrees, with two blocks on it. The higher block (m2) is 15 kg and the lower block (m1) is 20 kg. A 200N force is applied to the blocks and they move up the inclined plane at a constant speed. What force does the 15 kg block exert on the 20 kg...

Hi everyone. I have a simple doubt related to magnetism and inspired by the Bollywood movie 'ROBOT' staring Rajnikant. In the spectacular chase scene where Chitti(the robot) is trapped on a bridge with Aishwarya Rai( the heroine of the movie) and are surrounded by multitudes of policemen, he...

Here's a (crude) drawing: http://i44.tinypic.com/2mg9ts2.png A block with mass 1.5kg is pushed against a spring such that the spring compression is 0.2m. The block is then released from rest and is observed to have a velocity of 10m/s once it is released by the spring. The block then collides...

Hi all, I'm really stumped at this question five of my assignment. Could anyone please give me some help? I don't even know where to start. Thanks

Does anyone know of any good resources online of where I can get clear and simple explanations on this subject? I don't want to read journal articles about this or want websites with heavy duty math since I don't have time to go through all of that right now in that kind of depth. I just want...

Homework Statement A spring of negligible mass is compressed between two masses on a frictionless table with sloping ramps at each end. The masses are released simultaneously. The masses have the same volume, but the density of M1 is greater than that of M2. G-Greater than, L-Less than...

This isn't a joke, I really don't know if this is right or wrong. Please let me know if this is wrong so I can learn what I am not getting right. Homework Statement Three different sets of boxes are being pulled along frictionless surfaces attached to a rope that ends with the rightmost box...

Homework Statement A light spring of force constant 3.75 N/m is compressed by 8.00 cm and held between a 0.250 kg block on the left and a 0.490 kg block on the right. Both blocks are at rest on a horizontal surface. The blocks are released simultaneously so that the spring tends to push them...

Homework Statement Draw a free body diagram for the block on the frictionless ramp below. Break up any problem vectors into friendly vectors. Will you work in x and y components or parallel and perpendicular? Then, find the magnitude of each force you have labeled. Lastly, find the...

Homework Statement Here is the problem: "Two blocks of masses 1m and 3m are placed on a frictionless surface. A light spring is attached to the massive block, and the blocks are pushed together with the spring between them. A string holding the 2 blocks together is cutt, sending the 3m...

Homework Statement block 1 of mass m1 = 2.4 kg and block 2 of mass m2 = 1.4 kg are connected by a string of negligible mass. Block 2 is pushed by force of magnitude 23 N and angle θ = 40°. The coefficient of kinetic friction between each block and the horizontal surface is 0.18. What is the...

Homework Statement An 8kg block rests on an inclined plane where theta=37 degrees. The coefficient of kinetic friction on the plane is .23. The 8kg block is connect by a massless, frictionless pully to a hanging 16kg block. The blocks are released from rest. What is the acceleration...

Homework Statement Two wooden crates rest on top of one another. The smaller top crate has a mass of m1 = 22 kg and the larger bottom crate has a mass of m2 = 94 kg. There is NO friction between the crate and the floor, but the coefficient of static friction between the two crates is μs =...

Homework Statement Suppose the coefficient of kinetic friction between m1 and the plane in the figure is μk=0.20, and that m1=m2=2.2kg. a) As moves down, determine the magnitude of the acceleration of m1 and m2 given θ=28o. b) What smallest value of μk will keep this system from...

Homework Statement I'm stuck on this one, A 32.5-kg block (m1) is on a horizontal surface, connected to a 6.9-kg block (m2) by a massless string as shown in the Figure. The pulley is massless and frictionless. A force of 223.3 N acts on m1 at an angle of 30.1o. The coefficient of kinetic...

Homework Statement When three blocks are released from rest, they accelerate with a magnitude of 0.500 m/s2. Block 1 has mass M, block 2 has 2M, and block 3 has 2M. What is the coefficient of kinetic friction between block 2 and the table? (The blocks are arranged with block 1 hanging from...

Homework Statement A 4.32 kg block is placed on top of a 9.16 kg block. A horizontal force of F = 66.6 N is applied to the 9.16 kg block, and the 4.32 kg block is tied to the wall. The coefficient of kinetic friction between all moving surfaces is 0.169. There is friction both between the...

Homework Statement Blocks with masses of 2kg , 4kg , and 6kg are lined up in a row on a frictionless table. All three are pushed forward by a 60 force applied to the 2 block. how much force does the 4kg block exert on the 6kg block? how much force does the 4kg block exert on the 2kg...

Using extremely simple techniques: https://www.youtube.com/watch?v=-K7q20VzwVs

Homework Statement in the given diagram all the stings and pulley are mass-less ad there is no friction calculate the magnitude of acceleration of the two blocks? Homework Equations The Attempt at a Solution the acceleration of the blocks is obtained by me to be g/20 but...

A slab of mass m1 = 40 kg rests on a frictionless floor. a block of mass m2 = 10 kg rests on top of the slab ? Between block and slab, the coefficient of static friction is 0.60, and the coefficient of kinetic friction is 0.40. The block is pulled by a horizontal force with a magnitude of 100 N...

Homework Statement On 20 degree incline, there are two blocks tied together with a rope, sliding down. the block on the top has mass of 2.0 kg (m1) and u_k1(coefficient of kinetic friction for block 1) = .30 the block on the bottom of the incline has mass of 3.0 kg (m2) and u_k2 = .20 What is...

Homework Statement Two blocks mA= 5.0 g and mB= 10.0kg are connected to a string. Both blocks sit on a smooth inclined surface where the angle on the inclined plane is 30.0°. Block A is about block B on the incline. Find the acceleration of the system of two blocks. What is the tension TB in...

For some of my homework exercises, the lecturer has specified the values for a kernel of a square matrix minus the scalar product of the eigenvector and the identity matrix. Mathematically, I am given kernel(A - λI) = some integer value where A is a nxn square matrix lambda is the...